zhangstar333 commented on code in PR #13039:
URL: https://github.com/apache/doris/pull/13039#discussion_r984369604
##########
be/src/vec/functions/function_timestamp.cpp:
##########
@@ -214,6 +234,90 @@ struct MakeDateImpl {
}
};
+template <typename DateValueType, typename ArgType>
+struct DateTrunc {
+ static constexpr auto name = "date_trunc";
+
+ static bool is_variadic() { return true; }
+
+ static DataTypes get_variadic_argument_types() {
+ if constexpr (std::is_same_v<DateValueType, VecDateTimeValue>) {
+ return {std::make_shared<DataTypeDateTime>(),
std::make_shared<DataTypeString>()};
+ } else {
+ return {std::make_shared<DataTypeDateTimeV2>(),
std::make_shared<DataTypeString>()};
+ }
+ }
+
+ static DataTypePtr get_return_type_impl(const DataTypes& arguments) {
+ if constexpr (std::is_same_v<DateValueType, VecDateTimeValue>) {
+ return make_nullable(std::make_shared<DataTypeDateTime>());
+ } else {
+ return make_nullable(std::make_shared<DataTypeDateTimeV2>());
+ }
+ }
+
+ static Status execute(FunctionContext* context, Block& block, const
ColumnNumbers& arguments,
+ size_t result, size_t input_rows_count) {
+ DCHECK_EQ(arguments.size(), 2);
+ ColumnPtr argument_columns[2];
+ auto null_map = ColumnUInt8::create(input_rows_count, 0);
+ argument_columns[0] =
+
block.get_by_position(arguments[0]).column->convert_to_full_column_if_const();
+ argument_columns[1] =
+
block.get_by_position(arguments[1]).column->convert_to_full_column_if_const();
+ auto datetime_column = static_cast<const
ColumnVector<ArgType>*>(argument_columns[0].get());
+ auto str_column = static_cast<const
ColumnString*>(argument_columns[1].get());
+ auto& rdata = str_column->get_chars();
+ auto& roffsets = str_column->get_offsets();
+
+ ColumnPtr res = nullptr;
+
+ if constexpr (std::is_same_v<DateValueType, VecDateTimeValue>) {
+ res = ColumnVector<Int64>::create();
+ executeImpl(datetime_column->get_data(), rdata, roffsets,
+
static_cast<ColumnVector<Int64>*>(res->assume_mutable().get())->get_data(),
+ null_map->get_data(), input_rows_count);
+ } else {
+ res = ColumnVector<UInt64>::create();
+ executeImpl(datetime_column->get_data(), rdata, roffsets,
+
static_cast<ColumnVector<UInt64>*>(res->assume_mutable().get())->get_data(),
+ null_map->get_data(), input_rows_count);
+ }
+
+ block.get_by_position(result).column =
+ ColumnNullable::create(std::move(res), std::move(null_map));
+ return Status::OK();
+ }
+
+ static void executeImpl(const PaddedPODArray<ArgType>& ldata, const
ColumnString::Chars& rdata,
+ const ColumnString::Offsets& roffsets,
PaddedPODArray<ArgType>& res,
+ NullMap& null_map, size_t input_rows_count) {
+ res.resize(input_rows_count);
+ for (size_t i = 0; i < input_rows_count; ++i) {
+ auto& dt = (DateValueType&)ldata[i];
+ const char* str_data = reinterpret_cast<const
char*>(&rdata[roffsets[i - 1]]);
+ if (std::strncmp("year", str_data, 4) == 0) {
Review Comment:
input is not a const param, it's could contains year, day ,second.....in one
column
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